いっしょう 一生もん LinksSentence search for 一生もんSentence search for いっしょうもんSentence search for 一生モンKanji details for 一 and 生Edit in JMdict Noun1. something that will last a lifetime (esp. high quality product)See also 一生モノOther forms一生モン 【いっしょうもん】 Discussions Log in to talk about this word.